Originally posted by rellik while trying to separate the dust cap, i accidentally cut through the cone on the outside of the dust cap rather than on the inside

Did you cut through the voice coil wires?

If not, I'd try to do the refoam without removing the dust cap, many prefer to do it this way. I do and have never had a problem. Not sure on such a small driver but I expect that it would work.

Then if you finish the refoam with sucess, I suggest that you glue the cut if it is not too large, say less than half way around.
This repaired driver would likely work better than a substitute.
You could then take your time on ebay and look for a correct replacement.

one cone suffered far worse and had half of the cone detach as my knife slipped.

Once again i learn not to work when tired...

infinity no longer makes a replacement and old stock ones rarely show up. I saw one from ebay google cache about 6-7 mos back.

I got a pair of these from parts express and will see how they work. Its goofy but they are to make sound till I get time for a nicer project. It should fit the enclosure size wise from the measurements given. Infinity quotes a crossover freq of 300 hz from the woofer to the mid and 4k hz from the mid to the tweeter.

I have tried to trace out the crossover schematic but the inductors dont have values with them and I dont have an LCR to measure them.

where did you find the freq response graph for that dayton?

As for the other speakers on madisound i searched before buying those daytons, none in my price range will fit my enclosure without modifications... all the 5" are closer to 5.5" and all the 4-4.5" ones are just too small.

The Daytons have severe breakup modes in the 7-10k region, and need specific notch filters to deal with them. Crossing at 4k, they are going to sound pretty harsh. Look for paper cone drivers of similar size...something like the Vifa M11WH09-08 4.5" Coated paper cone midrange... link

If it's too small, you could make an adaptor ring of some kind out of masonite.